Artificial tooth.



W. ARKIN.

ARTIFICIAL TOOTH.

APPLICATION FILED JUNE 12. 1916.

1,203,298. Patented Oct. 31,1916.

unrrnn Parana Fnlcn.

WILLIAM ARKIN, or NEW YORK, N. Y.

ARTIFICIAL TOOTH.

Application filed June 12, 1916.

To all whomit may concern:

Be it known that I, l/VILLIAM ARKIN, a citizen of the United States, anda resident of the borough of Bronx, city of New York, county of Bronx,and State of New York, have invented certain new and useful Improvementsin Artificial Teeth, of which the following is a specification.

My improvements relate to what are known in dentistry as detachableteeth,

in which provision is made for deta'chably securing a porcelain or otherartificial tooth to a base, crown, bridge or other support, in suchmanner that a new front or tooth may be substituted for one that is wornor broken without the destruction or injury of the base or support.

The invention consists in the specific construction of parts describedand claimed.

In the accompanying drawings, Figure 1, is a side elevation of a toothattached to a base by means of my coupling-mount, the base being shownin cross section; Fig. 2, is a rear view of the tooth, the base beingomitted; Fig. 3, is a central vertical section of the tooth, mount, andbase or backing;

Fig. i, is a front elevation of a portion of the backing, the toothbeing omitted; Fig. 5, is an elevation of the outer or receiving end ofthe mortise or socket piece; Fig.- 6, a side elevation thereof; Fig. 7,an elevation of the inner end of the mortise or socket piece; Fig. 8, asection taken upon plane of line S8, Figs. 5 and 7; Fig. 9, is anelevation of the outer end of the tenon piece; Fig. 10, is an elevationof the inner end thereof; Fig. 11, is a side elevation thereof; Fig. 12,is a section taken upon plane of line 1212, Fig. 9; Fig. 13, is a viewlike unto Fig. 3, showing the tenon piece on the base or backingprotruding into a tooth socket formed in one piece with the tooth; Fig.1a, is sectional view of the one piece socket tooth shown in Fig. 13.

In the above named drawings, for convenience of illustration the partsare shown upon an enlarged scale.

The artificial tooth A, is made of porcelain .or any other suitablematerial in the usual way except that it is formed on its rear side witha socket or mortise m. This mortise is formed in a projecting lug ortenon and may be formed in one piece with the rest of the tooth A, as inFigs. 13 and Specification of Letters Patent.

Patented Oct. 31, 1916. Serial No. 103,061. I

14, or it may consist of a metallic mortise embedded therein, as in theother figures of the drawing, in which case the mortise m may beconstituted by a section of tubing, prefe ably of flattened character incross section,2'. 6., having two diameters, one considerably longer thanthe other. The mortise is also preferably, although not necessarily,rectangular in cross section as shown in the drawings; and when made asa metallic insert its inner edges are spread and outturned to formflanges or shoulders m, m which, act as anchors to retain and holdthesocket or mortise piece firmly embedded in.

the tooth. The anchor shoulders m, m, may be of angular, barbed orirregular form to insure intimate and rigid contact with the material inwhich they are embedded. In either case, whether made in one piece withthe artificial tooth or embedded therein, the side walls of the mortisem, are integral therewith, and said side walls are also made toprotrude, as at mi, beyond the back side of the tooth A.

The coupling pin or tenon t, is embedded in the base B, which latter maybe part of a bridge, crown, or other backing or support of any kind. Thetenon t, isformed with a head having an inturned flange t, creating arecess 2?, for the reception of the outer edges 71?), of the walls ofthe mortise m", as shown more particularly in Figs. 1, 3, and 13.

As indicated by cross hatching in Figs. 6, 10, and 11, the surfaces ofboth socket pieces m, and tenon piece 2f, may be roughened in anysuitable manner to increase frictional contact and adhesiveness.

The outer end of the tenon 25, may be recessed as at i Figs. 3, 9, and12, when the coupling parts are arranged as shown in Fig. 3, for thepurpose of afi'ording more space for cement and to obviate as far aspossible any visual indication of the pres ence of the coupling throughthe porcelain, which is more or less translucent.

My improved form of coupling affords ample security for the tooth whichis held rigidly in position on the base or backing, while should thetooth become unduly worn,

broken or impaired in any way it may be readily removed by ordinarydental tools and appliances, and another substituted in lieu thereofwithout injury to the supporting backing. In this connection it is to be2O porting appliance after the completion of noted that While coincidentangularity of contour is'desirable in the construction of the copulativeparts to insure strength and rigidity, still I do not wish to limitmyself thereto, since'an oval of flattened form in cross section mightbe resorted to without departing from the spirit and intent of myinvention.

By the use of my coupling device a tooth or facing may be easily removedand another substituted in lieu thereof without removing the supportingappliance from the patients month where such appliance has beenoriginally made and provided with my improved artificial tooth as hereinset forth. Furthermore by this means the danger of cracking theporcelain while soldering the bridge or support is obviated because thefacing or teeth may be mounted and cemented in position on the bridge orsupthe latter. Another advantage attained by the use of my invention andthe consequent ease of replacement of teeth is that all necessity forreinforcing the teeth with gold tips, etc., is obviated, therebyavoiding the exceptionally artificial appearance of such tipped teeth.Finally, and most important of all, my'improved form of artificial toothis especially adapted as an article of manufacture for dental trade andpractice, since it can be effectually and cheaply made as a stockarticle for embodiment with any suitable form of dental appliance,-thetenon t, and recess t ,being formed on and in the backing by thepractising dentist to meet the particular conditions and requirements ineach case, as may be found most eX- pedient.

It will be seen that the distinctive feature looseness and reinforcethem in this respect 7 against the strain to which they are subjectedduring the use of the tooth.

Copies of this patent may be obtained for What I claim as my inventionand desire to secure by Leters Patent is, 7

1. A dental mount of the character desiga hollow teri'on projectingtherefrom and a base or backing having a tenon adapted to fit within thehollow tenon of the tooth.

2. A dental mount of the character desig-- nated, comprising anartificial tooth formed with a rear mortise integral therewith, saidmortise being other than circular in cross section and having side wallsprojecting,

beyond the back of the tooth, and a base orbacking formed with a tenonembedded and firmly held therein andadap'ted to engage and fit saidmortise in the tooth, and being s also recessed to accommodate and fitthe protuberant side walls of the mortise on the section, and a base orbacking formed witha tenon embedded and firmly held therein and adaptedto engage and fit said angular mortise in the tooth, for the purposedescribed. 7

4. A dental mount of the character designated, comprising an artificialtooth formed with an integral projection having a mortise extending intothe body of the tooth, and

a backing provided with a tenon and en-' gageable in said mortise, saidmortise and tenon being other than circular in cross sec tion.

5. A dental mount of the character designated, comprising an artificialtooth having nated, comprising an artificial tooth formed 7 with aprojection with a mortise extending into the body of the tooth and abacking having a tenon and embedded therein and having a head withinturned flange forming a recess for the reception of the outer edges ofthe walls of said mortise.

6. A dental mount of the character designated comprising an artificialtooth portion formed with an integral lug mortised to receive a tenon,said mortise being angular in cross section, and-a base or backinghavinga tenon secured therein and shaped to be received :in said mortise.

WILLIAM ARKIN. Witnesses j Gno. WM. MIATT, DOROTHY MIATTV five centseach, by addressingthe Commissioner of. Patents,

Washington, D. C.

